You need to distribute the weight out on the glass from the clamp. I have not used this product, but just came up from a search. Sharing as an idea (no idea of the product or how well it works):
https://www.amazon.com/VIVO-Reinforcement-Compatible-Installations-STAND-AC01R/dp/B07NNVJHRY

The larger the surface area the better to distribute the weight more evenly.